参考文档：disassembling the oracle data block,writter by graham thornton 2005
操作系统信息
[oracle@rhl6 lib]$ uname -a
Linux rhl6.0x64 2.6.32-71.el6.x86_64 #1 SMP Wed Sep 1 01:33:01 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
数据库版本
SQL> set line 400
SQL> select * from gv$version;
INST_ID BANNER
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